[ZeRo_HUN]

You can do it with a global variable. Example :

Код:

//It will store the players' skin
new iPlayerSkin[ MAX_PLAYERS ];

public OnPlayerCommandText( playerid, cmdtext[ ] ) {
  if( strcmp( "/onduty", cmdtext, true ) == 0 ) {
    //Store the actual skin
    iPlayerSkin[ playerid ] = GetPlayerSkin( playerid );
    //Other codes... ( for example SetPlayerSkin... )
    return 1;
  }

  if( strcmp( "/offduty", cmdtext, true ) == 0 ) {
    //Load the stored skin
    SetPlayerSkin( playerid, iPlayerSkin[ playerid ] );
    return 1;
  }
  return 0;
}